How to Measure Toilet Rough In Distance and Size Easily and Quickly – LATEST!



Measuring the toilet rough in size is one important and major measurement you need to consider when you want to buy and fix a new toilet.

The Toilet rough in is the distance between the outlet pipe and the wall behind the toilet. Knowing your rough in size ensures your toilet will fit correctly and work properly.

Toilets are available in various sizes to fit different rough ins, so having a toilet that fits your rough in is certainly possible and definitely imperative.

Toilets also come in different brands like the TOTO, Kohler, American Standard, CADET, Gerber, duravit, 12 inches is the standard toilet rough in size, and most toilets sold in the US fit that measurement. Some homes, especially older ones, may have 10 or 14 inch rough ins.

The first step to installing a new toilet is to consider is size of the toilet “rough in”, the distance between the outlet pipe and the wall behind the toilet. Knowing the rough in size ensures the toilet will fit and work properly.

What is a toilet Rough-in distance?

The toilet rough in distance measurement is an important number you need to know before you get to buy a new toilet.

To discover your toilet’s rough-in, you will need to measure from the wall behind the toilet to the middle of the closet bolts, which hold your toilet to the floor.

That distance will likely be a bit more than the standard 10″, 12″, or 14″ rough-in dimensions. Round your measurement down to the nearest standard rough-in. If you have an old toilet with 4 bolts, measure to the rear ones.

When you are on the verge of procuring a new toilet, use a straight edge or sight down the back of the toilet to estimate where the wall would be. Measure from there to the middle of the bolt holes.

Ideally your replacement toilet should have the same rough-in as your old one. A smaller one will fit, though any items stored on top of the tank may tend to fall behind the toilet. A larger one won’t fit at all unless you change your plumbing or move the wall.

What is the rough in dimension for a toilet?

Toilet rough in is the measurement from the wall of the bathroom to the bolt cap of the toilet. In toilets, the rough in distance is the distance from the wall behind the toilet to the center of the toilet outlet pipe where the waste matter leaves during flushing.

The most common distance is 12 inches, so most toilets have a “12-inch rough.”

What is the toilet rough in standard measurement or size?

The standard toilet rough in distance is 212 inches but in the older homes and older toilets and even corner toilets, you can find toilets with rough in distances of 10 inches to even 14 inches.

How far does a toilet have to be from the wall?

Standard drywall is 1/2 inch thick, so the plumber should set the toilet flange at least 15-1/2 inches from the center of the flange to the wall framing.

The standard distance from the back wall is 12 inches, or 12-1/2 inches from the center of the flange to the wall framing.

How much space do you need for a toilet?

Most codes require at least 15 inches (measured from the center of the toilet) from any side wall or obstruction and not closer than 30 inches center to center to any other sanitary fixture.

(The NKBA actually recommends 32 inches.) There should be at least 24 inches of clear space in front of a toilet or bidet.

How to Measure a Toilet’s Length from the Wall

Replacing the toilet is certainly not the most glamorous do-it-yourself project. Neither is it the hardest. Replacing a toilet is a job many intermediate do-it-yourselfers are willing to tackle.

Of course, you have to buy a new toilet before you can replace the old one. Before you head out to the home store, arm yourself with a few measurements that you need when selecting a toilet. Having a helper makes this little job a breeze.

STEP 1 rough in measuring

Raise the toilet seat to get it out of the way.

STEP 2 rough in measuring

Place a 4-foot spirit level upright against the end of the bowl — the farthest spot from the wall. Have your helper hold the level plumb.

When the bubble is in the center of the glass tube, it is plumb. You can’t take the measurement on top of the bowl because the tank is in the way.

STEP 3 Rough in measuring

Measure from the wall just above the toilet lid to the level with a tape measure. If the raised seat is in the way, measure just above it. This is your toilet’s length

Things You Will Need in measuring the toilet rough in distance

You need the following before the measurement:

  • 4-foot spirit level
  • Measuring tape

Tip on how to measure the toilet rough in distance

Another important toilet measurement is the distance from the wall to the bolts that hold the toilet to the floor. Measure from the wall to the center of the bolt caps.

If there is a baseboard or a shoe molding, add the thickness of these to the measurement. This is the rough-in measurement.

How to Determine a Toilet’s Rough in Opening

When you are installing a new toilet in a bathroom, the space available is an important thing to consider. You need enough space behind the toilet for the toilet’s tank to sit.

In order to know how much space is available, you need to determine the rough opening. The rough opening is the distance between the center of the drain in the floor and the wall.

Most rough openings are 12 inches, but can be as little as 10 inches and as much as 14 inches.

1 Place the end of a tape measure against the wall behind the existing toilet, not on the molding at the base of the wall.

2 Stretch the tape measure to the bolt cap on the base of the toilet.

3 Read the measurement at the bolt cap. This is the toilet’s rough opening.

Things You Will Need

Tape measure

Some major Toilet rough In distances and Measurements

There are other toilet rough in distances like:

  • 4 inches rough in toilet
  • 5 inches rough in toilet
  • 6 inches rough in toilet
  • 7 inches rough in toilet
  • 8 inches rough in toilet
  • 9 inches rough in toilet
  • 10 inches rough in toilet
  • 11 inches rough in toilet
  • 12 inches rough in toilet
  • 13 inches rough in toilet
  • 14 inches rough in toilet
  • 15 inches rough in toilet
  • 16 inches rough in toilet
  • 17 inches rough in toilet
  • 19 inches rough in toilet
  • 20 inches rough in toilet
  • 25 inches rough in toilet
  • 26 inches rough in toilet etc.

Rough in distances for all toilet types can be measured like:

  • ADA
  • CENTER
  • OFFSET
  • HIGH
  • ELONGATED TOILET
  • ROUND TOILET
  • ROUND TOILET COMFORT HEIGHT
  • DUAL FLUSH
  • ONE / TWO PIECE
  • PRESSURE / VACUUM GRAVITY ASSIST TOILET
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